An improved method for traffic control relying on close-loop control theory

Urban traffic adaptive control has been considered the most advanced traffic control in the traffic engineering, however, it belongs to the low-level (open-loop control)in the control engineering theory. In recent years, the promotion and application of computer video detection technology have made the real-time detection of delays possible, and have also provided a platform and opportunity for the open-loop control turning into closed-loop control in the traffic control. The parameters referring to traffic control are extracted from video traffic detection, therefore, the control effect is evaluated. Based on the evaluation results, the requirement for adjustment scheme can be analyzed, and a new traffic control scheme can be generated to construct the urban roads traffic control closed-loop self-tuning system. So the system control strategy can be adjusted real-timely according to the system output, and the open-loop control will be upgraded to the closed-loop control in the traffic control.